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Pretreating agent for ultrafine tailings as well as preparation method and application thereof

A pretreatment agent and mine-used technology, applied in the field of polymers, can solve problems such as poor flocculation effect and inability to flocculate ultrafine tailings solid matter

Active Publication Date: 2018-06-08
SHANDONG NUOER BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that existing flocculation products have poor flocculation effect and cannot flocculate solid matter in ultrafine tailings, the present invention provides a method for preparing a pretreatment agent for ultrafine tailings, and a pretreatment agent prepared by the method Pretreatment agent and its application

Method used

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  • Pretreating agent for ultrafine tailings as well as preparation method and application thereof
  • Pretreating agent for ultrafine tailings as well as preparation method and application thereof
  • Pretreating agent for ultrafine tailings as well as preparation method and application thereof

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preparation example Construction

[0028] The invention provides a method for preparing a pretreatment agent for ultrafine tailings. The preparation raw materials used include the following components: 2-5 parts by weight of acrylamide, 5-10 parts by weight of polyethylene glycol, dimethyl di 300-600 parts by weight of allyl ammonium chloride, 2-4 parts by weight of tetramethylethylenediamine, 2-6 parts by weight of vinylpyrrolidone, 100-200 parts by weight of solvent, 0.03-0.06 parts by weight of chain extender and initiator Agent 0.18 ~ 0.62 parts by weight and a certain amount of fumed silica. Described preparation method comprises the steps:

[0029] (1) Premix: Mix acrylamide, polyethylene glycol, dimethyldiallyl ammonium chloride, tetramethylethylenediamine, vinylpyrrolidone and a solvent to prepare a mixed solution. In this step, polyethylene glycol is selected from any one of PEG2000, PEG4000, PEG6000, PEG8000, and PEG10000, preferably PEG10000. The solvent used can be deionized water, ultrapure water...

Embodiment 1

[0035] Mix 150 parts by weight of deionized water, 3 parts by weight of acrylamide, 8 parts by weight of PEG10000, 450 parts by weight of dimethyl diallyl ammonium chloride, 3 parts by weight of tetramethylethylenediamine, and 4 parts by weight of vinylpyrrolidone , and then add adipic acid, adjust the pH value to 4.0, and adjust the temperature to 20°C.

[0036] Nitrogen was passed for 40 minutes to achieve the purpose of oxygen removal, and 0.3 parts by weight of a chain extender (comprising 0.12 parts by weight of dimethylamine and 0.18 parts by weight of N,N-dimethylacrylamide), and 0.3 parts by weight of azobisisobutyramide hydrochloride were added Salt, 0.06 parts by weight of ammonium persulfate and 0.03 parts by weight of sodium bisulfite initiate polymerization, and when the temperature of the system rises to 85° C. and no longer rises, the reaction is considered to be completed.

[0037] The colloidal polymer is chopped and then dried, and crushed to 20-100 mesh to o...

Embodiment 2

[0043] Mix 100 parts by weight of deionized water, 2 parts by weight of acrylamide, 5 parts by weight of PEG10000, 300 parts by weight of dimethyl diallyl ammonium chloride, 2 parts by weight of tetramethylethylenediamine, and 2 parts by weight of vinylpyrrolidone , then add adipic acid, adjust the pH value to 3.5, and adjust the temperature to 18°C.

[0044] Nitrogen was passed for 40 minutes to achieve the purpose of deoxygenation, and 0.6 parts by weight of a chain extender (comprising 0.24 parts by weight of dimethylamine and 0.36 parts by weight of N,N-dimethylacrylamide), 0.2 parts by weight of azobisisobutylamidine hydrochloride were added Salt, 0.07 parts by weight of ammonium persulfate and 0.04 parts by weight of sodium bisulfite initiate polymerization, and when the temperature of the system rises to 78° C. and no longer rises, the reaction is considered to be completed.

[0045] The colloidal polymer is chopped and then dried, and crushed to 20-100 mesh to obtain a g...

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Abstract

The invention relates to a pretreating agent for ultrafine tailings as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) pre-mixing materials: mixing acrylic amide, polyethylene glycol, dimethyl diallyl ammonium chloride, tetramethylethylenediamine, vinyl pyrrolidone and a solvent to prepare a mixed liquid; (2) adjusting the mixed liquid: adjusting the temperature and the pH value of the mixed liquid and performing nitrogen-introducing and oxygen-removing treatment on the mixed liquid; (3) performing polymerization: adding a chain extender and an initiator into the mixed liquid treated in the step (2) and performing polymerization reaction on the system under the action of the initiator; and (4) performing aftertreatment: afterthe reaction, preparing particles from the collected reaction products and mixing the particles and fumed silica so as to prepare the pretreating agent. The pretreating agent provided by the inventionis added before the common flocculating agent is used, ultrafine particles of tailing water are polymerized rapidly to form large particles, and then the common flocculating agent is added to form large particles through flocculation, so the effect is remarkable.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a preparation method of a pretreatment agent for ultrafine tailings, the pretreatment agent prepared by the method and its application. Background technique [0002] According to its chemical composition, flocculants can be generally divided into two types: inorganic flocculants and organic flocculants. Inorganic flocculants include inorganic coagulants and inorganic polymer flocculants; organic flocculants include synthetic organic polymer flocculants, natural organic polymer flocculants and microbial flocculants. However, for the flocculation of some special sewage, the effect of these flocculants is not very good, or even ineffective. These sewage have a common feature, containing a large number of ultrafine solid particles, forming a stable electric double layer structure with water, which has the nature of colloid and is very stable. It is difficult for ordinary organic fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C02F1/52C08F226/02C08F220/56C08F226/10
CPCC02F1/5236C02F1/56C08F226/02C08F220/56C08F226/10
Inventor 荣敏杰许永升于庆华荣帅帅
Owner SHANDONG NUOER BIOLOGICAL TECH
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